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총괄 변수 모델을 이용한 DPF 재생 성능에 관한 연구
전문수,Chon, Mun Soo 한국교통대학교 융복합기술연구소 2011 융ㆍ복합기술연구소 논문집 Vol.1 No.1
With the world-wide demand on the emission minimization, the needs on the diesel aftertreatment devices with high efficiency are also increasing. In order to effectively develop or design a high-performance diesel particulate filter, a clear understanding on the deposition and regeneration mechanism is required. In the present study, a theory on the lumped parameter model for wall-flow type diesel particulate filters is described focusing on the deposition efficiency, pressure drop inside the filter. The fourth order explicit Runge-Kutta method is utilized for the mass flow rate computation. Engine operation modes with controlled and uncontrolled regeneration options are selected. The computational lumped parameter model is validated by comparing the computed results with the measured data.
전문수 ( Mun Soo Chon ),김현철 ( Hyunchul Kim ),추성화 ( Seonghwa Choo ) 한국액체미립화학회 2016 한국액체미립화학회 학술강연회 논문집 Vol.2016 No.-
To evaluate the permeable pressure level of high pressure vessels and piping with limited timing and cost, statistics method was used to this calculation. To get the 1ppm permeable pressure level of products, did a 2 or 4 level`s impulse pressure test and got the pass & failure quantity at each pressure level. And logit distribution was used and plotted into probability paper. Minimum two point of pressure level and standard deviation, straight line is determinate by regression.
전문수 ( M. S. Chon ),황용하 ( Y. H. Hwang ) 한국분무공학회 2004 한국액체미립화학회지 Vol.9 No.4
N/A This paper describes the improvement of engine cooling system. To improve engine cooling performance, the authors approached in two ways. One is to increase water pump performance, changing of impeller shape and lightening of material were carried out. The second one is cooling efficiency rise, which were investigated with head gasket coolant flow passage optimization with flow visualization technique. The test results show that water pump performance was increased effectively, reduction of pump drive torque, and increase of pump flow-rate and pressure rise. Gasket hole pattern optimization test results represent an optimized head coolant flow which stands cross flow from exhaust to intake port side and small vortex were removed.
고압 디젤 인젝터 노즐 홀 수가 연료 분무 및 배기 특성에 미치는 영향
전문수 ( Mun Soo Chon ) 한국분무공학회 2012 한국액체미립화학회지 Vol.17 No.4
This paper This paper presents effect of nozzle hole number on spray characteristics and engine performance. Experiments were conducted to measure spray penetration and SMD distributions using a spray visualization system and PDPA (phase Doppler particle analyzer) system. In addition, engine performance and emission characteristics were measured using a single cylinder engine and emssion measurement systems. Results showed that 8-hole-injector exhibits improved spray performances. Furthermore, soot emission was decreased with 8-hole-injector, compared to that of 6-hole-injector.
한철희,전문수,Han, Cheolheui,Chon, Munsoo 한국교통대학교 융복합기술연구소 2013 융ㆍ복합기술연구소 논문집 Vol.3 No.1
Unsteady fluid dynamics analysis of flow characteristics inside a Metal DPF system is done using a commercial CAE software, CFD-ACE+. The time profiles of both temperature and pressure of exhaust gas are given as initial conditions. It was found that the position of connecting pipes and the numbering of exhaust gases did not affect the flow uniformity. The presence of a DPF resulted in the significant flow nonuniformity effect on the flow characteristics at the inlet of the DPF. Present results can be applied to the selection of optimal geometry that produces uniform flow characteristics inside a DPF system.